IMMUNOAFFINITY CHROMATOGRAPHY OF S-TRIAZINES

Immunoaffinity chromatography (IAC) provides a selective method for sa mple preparation prior to high-performance liquid chromatography (HPLC ) or gas chromatography (GC). Five different support materials were te sted for their suitability with regard to IAC of herbicides (s-triazin es). Three gels showing low (0-10 %) nonspecific s-triazine adsorption were used as affinity supports (Beaded cellulose ONE-carbonate A, LiC hroprep hydrazide tentacle gel and LiChroprep azlactone gel). A monocl onal antibody (K4E7), directed against atrazine, was covalently couple d to the gels. High antibody immobilization rates (100 %) were obtaine d with the beaded cellulose gel in comparison to the other gels (60-70 %). Subsequently the IAC columns were loaded with triazine solutions. Glycine-HCl 0.2 mol/L, pH 2.2 yielded the best results for the elutio n of the bound triazines from the beaded cellulose IAC columns (70-100 %). Both the hydrazide tentacle and the azlactone IAC columns showed lower elution rates (60-80 %).